The reply will be in two halves, mine first with what I know, you may already have some or all of it, and then my wife's reply regarding her family.
I know Rawdon crematorium well as I am a part time hearse driver, I also live about 2 miles from there.
As you will know Knotfield is long gone, the only bit left are the steps which were in front of the house, they now used to get to and from the car park.
Emily was born in1862 possibly in the public house called Old malt mill inn owned by the Dawson family,her Father William was the landlord, his Father ( William Brice Wilshire died in 1850 and is buried in a family grave with other members of my wife's family there are 14 names on the grave stone)
According to the records when Emily married the 21 year old Benjamin, she was only 16,was this Benjamin the Brother of John who lived at Knotsfield and who died in his 30s?
There are pictures of the Old malt mill inn on a site called Leodis.
When Benjamin returned to England did Emily come with him? If so did she go back to New Zealand? Did she have any children with him? did she remarry?
I will get my wife to go into detail about how she is related to Emily.
If I think of anything else I will post again.
Regards Graham